Archives for July 2016

We recently attended the 25th Edition of the European Conference on Networks and Communications (EuCNC) 2016 held in Athens, Greece, from the 27th to the 30th of June 2016. We presented our paper: “SDN-Based Channel Assignment Algorithm for Interference Management in Dense Wi-Fi Networks” based on the work in WP4.

The paper was presented the 28th during the session “SDN-based switch/router architecture”. The presentation was a great success and the audience showed great interest in the work which generated several questions. We had a short and lively discussion about some implementation details of the SDN-based controller and possible new performance evaluations to be developed as part of the future works.

During the Ultra-fast Broadband Seminar 2016 (27/06/2016 – 01/07/2016) the Wi-5 project presented the demo: Can a Wi-Fi WLAN Support Real-Time Services During a Handoff?. The seminar brings together different regulators and regulatory experts from operators, broadband product managers, broadband access network architects and broadband home experts.

Luis Sequeira and José Almodovar presented a seamless handover between access points which are required for supporting user mobility in Wi-Fi networks. In this case, “seamless” means that the player of a First Person Shooter must experience a good quality. People from Swisscom, Proximus, Broadband Forum, Adtran, BIPT, Nokia and others were very interested in our project and asked for more information. Also we had the opportunity to exchange different points of view with similar cloud-based solutions.

Demo setup:

Two TP-Link1043NDv2 APs are used, configured in channel 1 and 11 (2.4 GHz band) respectively. The controller runs Linux Debian. Laptop A is being switched from an AP to another every 15 seconds. Laptop B always uses the same AP.

Laptop A is connected to an Odin Wi-Fi network, and it generates a Counter Strike traffic flow. No other machines are connected to that SSID. The controller is running an application that has been configured to handoff the client every

15 seconds from one AP to another. The delay and jitter are produced by the wireless technology and do not significantly increase after the handoff. Players can experience a good quality despite packet loss rate.